cornwall



(No Model) P. GHGUTEAU 8v F. R. CORNWALL.

`IIITEGIIIIENI EOE IIIEEGI ACTING ENGINES. No. 531,834.

Zay/573.9146@ NTTED STATES PATENT FFI@ PIERRE CIIOUTEAU AND FREDERICK R.CORN WALL, OF ST. LOUIS, MISSOURI;

SAID CORNWALL ASSIGNOR TO SAID CHOUTEAU.

ATTACHMENT FOR DIRECT-ACTING ENGINES.

SPECIFICATION forming part of LettersPatent N o. 531,834, dated January1, 1895.

Application filed August 4, 1894. Serial No. 519 ,440. (No model.)

To au whom it may concern.- struction-shoulder to a flange on aninteriorly- Be it known that We, PIERRE CHOUTEAU threaded collar C,which collar turns loosely and FREDERICK R. CORNWALL, citizens of the onthe cylinder. The bore of the cylinder at United States, residing at thecity of St. Louis, its upper end is formed with the shoulder a 55 5State of Missouri, have invented certain new upon which rests and isloosely supported a and useful Improvements in Attachments for closetting independent cylinder head D, Direct-Acting Engines, of which thefollowing which in conjunction with the base of the hanis a full, clear,and exact description, referdie E forms a live fluid chamber G', whichencebeinghad to the accompanyingdrawings, communicates with the ports A"to distrib- 6o to Whereinute the live fluid beneath the head of the pis-Figure l is a longitudinal sectional View t0n. Thisindependentcylinder-head or auxthrough an engine'provided with our attachiliarycylinder head, as it might be termed, ments. Fig. 2 is a plan-view ofthe engine outside of forming the live fluid chamber for cylinder. Fig.3 is a sectional View through the reception and distribution of the livemo- 65 t5 the handle, taken on line 3 3, Fig. l. Fig. t tive fluid tothe engine, also forms a yielding is a detail sectional View, showingthe parts cushion for the piston on its upstroke, as illusin a differentposition from what is illustrated trated in Fig. 4. The live fluid has atendency in Fig. l; and Fig. 5 is adetail view of a modito always holdthis cushioning-head D to its ication. seat et, at all times, by reasonof the increased 7o zo Our invention relates to new and useful imareapresented by the upper surface over the provements in attachments fordirect-acting area presented by the lower surface. Moreengines, andconsists in forming an inlet port over, as the piston is ascending, thespace or Way through the engine handle, whereby therebetween and thehead D is being exthe conducting-pipe which connects the enhausted.Therefore, the head D is held to its 7 5 25 gine to asuitable source ofsupply, is in aconseat. The momentum ofthe piston on its upvenient placeand out of the way of the operstroke very often vcarries it beyond itssupator. posed limit of stroke, and the upper face of Another feature ofour invention resides in the piston hammers itself on the end closingthe improved means for attaching the handle plate of the bore. The headDWillyield under 8o 3o to the engine cylinder whereby the same may thiscondition and when the piston strikes, it be located at a desirablepoint; and, finally, in will be forced u p slightly, absorbing the shockintroducing into the bore of the cylinder an or jar, and, by cushioningthe parts, insure a independently-movable cylinder-head which longerlife to the engine. is held in its place by the pressure of live Thehandle is formed withabase-portion E, 85 3 5 fluid and which acts as acushion or butter for from which projects a threaded flange F,which thepiston at the extreme of its stroke. co-operates with the threads on thecollar C,

The engine which is shown in the drawings to hold the parts together.Any suitable lockis substantially the same in construction and ingdevice may be used to hold the collar C operation, so tar as the pistonand its carried stationary, or to lock the base of the handle 9o 4odistributingwalve is concerned, as the engines and collar O to thecylinder. In Fig. 3, We have shown and described in United StatesLetters shown a pin .I passing through the base E, Patent No.434,976, ofAugust 26, 1890, and No. flange F, shoulder B, and flange of collar C,519,147, of May l, 1894. Therefore, no dewhich will retain the partsagainst displacetailed description need be given here of those ment, andin Fig. 5 we have shown a pin C 95 Y 4.5 parts. passing through thecollar C into an opening In the drawings, A indicates the cylinder inshoulder B to prevent the collar C from formed with tool-shank opening Ain its front turning. Pin C' is held in place by a strap end, exhaustport A, and inlet-ports A", as spring C. Such a construction could alsobe is common. Located at the upper end ot' the utilized to lock thehandle base in position. Tco 5o cylinder, is an annulus or ring B,preferably Extendingtromthe handlebaseE,isahand formed integraltherewith, which offers an obstock which is adapted to be grasped by thelive luid chamber G.

operator to manipulate the tool. This handstock is formed throughout itslength with an inlet conducting port G, which opens into the In thelength of this conducting port G, is a valve H, shown in the drawings asan ordinary plug-valve, operated v by a handle H', but it is obviousthat any suitable form of valve may be employed to admit or cut oft themotive fluid to the engine.

At the eXtreme outer end of the handle, we preferably form a threadedboss I, to which a suitable coupling may be attached to connect the portG with a source of supply of the motive fluid.

In Fig. 5, we have shown a modified form of the head D in which the sameis rigidly held in its place by an extension on its upper face, whichextension is impinged upon by the handle-base E, when it is screwedhome. This construction might be desirable in some instances Where thestroke of the piston was too short to admit of its hitting the head B,but it would be advantageous to have present in the engine the livefluid chamber G.

I-Iaving thus described our invention, What we claim, and desire tosecure by Letters Patent, is-

' l. In an engine, the combination with the cylinder, of an independenthead mounted in its bore, a projection on said head, a cylinder head inthe form of a handle base which is secured to the cylinder, and whichretains said independent head in position by impingement, and a handleon said handle base, through'which handle isformed an inlet port leadingto between the two cylinder heads, substantially as described.

2. In an engine, the combination with the cylinder having a ring formedthereon near its upper end, a collar loosely mounted on said ring anauxiliary cylinder head which is mounted in the bore of the cylinder,and a cylinder head which'is mounted in the collar, between which twoheads is formed a live iiuid chamber, substantially as described.

v3. In an engine, the combination with the cylinder, of a ring formedthereon near its

